Inner structure of QED and its gauge invariant angular momenta: A new viewpoint to the final resolution of the nucleon spin crisis

Inner structure of QED and its gauge invariant angular momenta: A new viewpoint to the final resolution of the nucleon spin crisis
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QED的内部结构及其规范不变角动量:最终解决核子自旋危机的新观点

DOI:
10.1103/physrevd.84.047701
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发表时间:
2011-08
期刊:
影响因子:
5
通讯作者:
Zhou, Bao-Hua
Zhou, Bao-Hua
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Huang, Yong-Chang;Zhou, Bao-Hua

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当规范势被分解成两个正交分量时,我们发现了QED的内部结构。在此基础上,将电子-光子系统的拉格朗日量展开为一种新的形式,利用场论的一般方法,从诺特定理中自然得到电子和光子的规范不变自旋和轨道角动量算符。我们的方法可以推广到非阿贝尔系统来研究QCD的内部结构,为研究核子自旋危机提供了一个新的视角,并为严格和系统地解决这一长期存在的问题打开了一扇窗。
We discover an inner structure of QED while the gauge potential is decomposed into two orthogonal components. Based on this, the Lagrangian of the electron-photon system is expanded to a new form and by the general method of field theory, the gauge invariant spin and orbital angular momentum operators of the electron and photon are naturally obtained from Noether's theorem. Our method, which can be generalized to the non-Abelian systems to investigate the inner structure of QCD, provides a new perspective to look on the nucleon spin crisis and opens a window into a strict and systematic resolution of this long-standing problem.
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